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LT6105CDCB#TRPBF

Description
SP Amp Current Sense Amp Single 36V Automotive 6-Pin DFN EP T/R
File Size375KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LT6105CDCB#TRPBF Overview

SP Amp Current Sense Amp Single 36V Automotive 6-Pin DFN EP T/R

LT6105CDCB#TRPBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.33.00.01
TypeCurrent Sense Amplifier
Number of Elements per Chip1
Number of Channels per Chip1
Minimum CMRR Range (dB)85 to 95
Minimum CMRR (dB)94
Minimum PSRR (dB)98
Typical Output Current (mA)1(Min)@12V
Maximum Input Offset Voltage (mV)1@12V
Maximum Operating Supply Voltage (V)36
Maximum Supply Voltage Range (V)30 to 50
Minimum Single Supply Voltage (V)2.85
Typical Single Supply Voltage (V)28|3|5|9|12|15|18|24
Maximum Single Supply Voltage (V)36
Maximum Supply Current (mA)0.35@36V@0C to 70C
Minimum Operating Temperature (°C)0
Maximum Operating Temperature (°C)70
Supplier Temperature GradeCommercial
PackagingTape and Reel
Power Supply TypeSingle
Pin Count6
Standard Package NameDFN
Supplier PackageDFN EP
MountingSurface Mount
Package Height0.75(Max)
Package Length2
Package Width3
PCB changed6
Lead ShapeNo Lead
LT6105
Precision, Extended Input
Range Current Sense Amplifier
FEATURES
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DESCRIPTION
The LT
®
6105 is a micropower, precision current sense
amplifier with a very wide input common mode range.
The LT6105 monitors unidirectional current via the volt-
age across an external sense resistor. The input common
mode range extends from –0.3V to 44V, with respect to
the negative supply voltage (V
). This allows the LT6105
to operate as a high side current sense monitor or a low
side current sense monitor. It also allows the LT6105 to
monitor current on a negative supply voltage, as well as
continuously monitor a battery from full charge to depletion.
The inputs of LT6105 can withstand differential voltages
up to ±44V, which makes it ideal for monitoring a fuse or
MOSFET switch.
Gain is configured with external resistors from 1V/V to
100V/V. The input common mode rejection and power
supply rejection are in excess of 100dB and the input offset
voltage is less than 300μV. A typical slew rate of 2V/μs
ensures fast response to unexpected current changes.
The LT6105 can operate from an independent power
supply of 2.85V to 36V and draws only 150μA. When
V
+
is powered down, the sense pins are biased off. This
prevents loading of the monitored circuit, irrespective of
the sense voltage. The LT6105 is available in a 6-lead DFN
and 8-lead MSOP package.
, LT, LTC, LTM and Over-the-Top are registered trademarks of Linear Technology
Corporation. All other trademarks are the property of their respective owners.
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Very Wide, Over-the-Top
®
, Input Common Mode Range
- Extends 44V Above V
(Independent of V
+
)
- Extends –0.3V Below V
Wide Power Supply Range: 2.85V to 36V
Input Offset Voltage: 300μV Maximum
Gain Accuracy: 1% Max
Gain Configurable with External Resistors
Operating Current: 150μA
Slew Rate: 2V/μs
Sense Input Current When Powered Down: 1nA
Full-Scale Output Current: 1mA Minimum
Operating Temperature Range –40°C to 125°C
Available in 2mm
×
3mm DFN and 8-Lead MSOP
Packages
APPLICATIONS
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High Side or Low Side Current Sensing
Current Monitoring on Positive or Negative Supply
Voltages
Battery Monitoring
Fuse/MOSFET Monitoring
Automotive
Power Management
Portable Test/Measurement Systems
TYPICAL APPLICATION
Gain of 50 Current Sense Amplifier
SOURCE
–0.3V TO 44V
R
IN2
V
S+
100Ω
0.02Ω
R
IN1
100Ω
LT6105
GAIN ERROR (%)
+IN
4
Gain Error vs Input Voltage
V
+
= 12V
3 V
SENSE
= 50mV
R
IN
= 100Ω
A
V
= 50V
2
1
0
–1
–2
–3
6105 TA01
T
A
= – 40°C
T
A
= 25°C
+
V
+
V
OUT
V
OUT
= 1V/A
R
OUT
4.99k
–IN
V
S–
T
A
= 125°C
T
A
= 85°C
V
TO LOAD
2.85V TO 36V
V
OUT
=
V
S
V
S
(
+
)
R
R
OUT
; A
V
=
OUT
; R
IN1
=
R
IN 2
=
R
IN
R
IN
R
IN
–4
0
5
10
15
20
25
30
35
40
45
6105fa
V
S+
INPUT VOLTAGE (V)
6105 TA01b
1
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